3 sttep mottors with 6 wires with arduino

Dear friends!

First off all, sorry for my poor english!

Now...

I'm using an Arduino board, with a CNC shield V3 board and 3 A4988 drivers to controll 3 sttep motors with 6 wires each one.

I learned that when we use this kind of mottor, we have to connect the 2 remaining wires with the GND.

But all examples that I see shows that with just a single mottor. And when a connect 6 wires (2 form each mottor) to CNC Shield GND pin, the wires get hot and everything starts to smoke.

So how could I use 3 Sttep motors with 6 wires each one with an Arduino CNC V3 Shield board?

Thank you in advance!

sicario666:
I learned that when we use this kind of mottor, we have to connect the 2 remaining wires with the GND.

NO

Each of the coils on the motor has three wires, one to each end and one to the middle of the coil. The wire to the middle of the coil should not be connected to anything.

...R

First things first, please post full data on your exact stepper motor - it might not be suitable for an A4988
driver in the first place, lets establish what the hardware actually is before anything else...

MarkT:
First things first, please post full data on your exact stepper motor - it might not be suitable for an A4988
driver in the first place, lets establish what the hardware actually is before anything else...

Sorry, but I can't. I bought 3 refurbish steppers with no data at all, and the sellers didn't know as well.
They just said that was 3 Nema17 with 4kgf, 3 Nema 23 with 5kgf and 3 Nema 23 with 10kgf.

I put it (Nema17) in my CNC shield and it works with the A4988 drivers.

I notice as well that when I connect the two midles wires on my CNC GND pin, it works with more power than when I don't. And it works well. But when I use the 3 sttepers at the same time it get too hot.

Thank you for your concerns!